Bacterial Leaf Spot of English Ivy
Xanthomonas hortorum pv. hederae
English Ivybacterial
A bacterial disease specific to ivy, producing dark water-soaked leaf and stem spots.
Symptoms
Small, water-soaked, dark green-to-black spots on leaves, often with a yellow halo, that can spread to leaf stalks and stems in wet conditions.
Cause & development
Named for and specifically documented on Hedera (English Ivy). EPPO code XANTHE.
Favorable conditions
- •Wet foliage from overhead watering or misting
- •High humidity and poor air circulation
- •Overcrowded plants with little airflow
Management
- 1Water at the soil line rather than the leaves
- 2Remove and discard affected leaves
- 3Space plants for better airflow
- 4Avoid handling wet foliage to reduce spread
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